[U-Boot] Faster boot time

[Dat Tran]

That is amazing. I have been looking for this type of project for a long
time. Thank you very much. I will start to look at your patches. Will the
patches work well with the newer versions like U-Boot 2011.09 or later, or
is there a more specific version you recommend. Thanks.


On Mon, Sep 26, 2011 at 10:32 AM, Simon Schwarz <
simonschwarzcor at googlemail.com> wrote:

> On 09/26/2011 04:30 PM, Dat Tran wrote:
>
>> Sorry for my ignorance on this issue. My current system (Overo) does
>> this when it boots:
>>
>>     ROM Code -> X-Load (MLO) -> U-Boot -> Linux Kernel -> Root File System
>>
>> Does the SPL patch allow me to do this?:
>>
>>     ROM Code -> U-Boot (MLO) -> Linux Kernel -> Root File System
>>
>                    ^U-Boot SPL
>
>
>>
>> Also running the latest X-Loader 1.50 and U-Boot 2011.09-rc1, it takes
>> about 2 seconds from power on to starting the Linux Kernel. My Kernel
>> takes 1 second to load and my file system takes another 1.5 seconds for
>> a total of 4.5 seconds from power on to the login prompt on serial. I
>> assume the U-Boot-SPL will only speed up the first half of my boot time.
>>
> correct.
>
>
>  If so, how much of a difference do you think I will see with this patch.
>>
> I can't say it for your case.
>
> I did this on a devkit8000 loading from NAND. The U-Boot (unoptimized) took
> 3189 ms and Xloader took 1170 ms. By using the SPL this was reduced to 850
> ms. Another patch I'am working on ATM is utilizing DMA to copy the Linux
> images - this reduces the time spend in SPL to 220 ms.
>
>
>> Thanks.
>>
>>
> Regards
> Simon
>
>  On Mon, Sep 26, 2011 at 7:40 AM, Simon Schwarz
>> <simonschwarzcor at googlemail.**com <simonschwarzcor at googlemail.com><mailto:
>> simonschwarzcor@**googlemail.com <simonschwarzcor at googlemail.com>>>
>> wrote:
>>
>>    Stands for Second Program Loader.
>>
>>    It loads the U-Boot and runs it - or with this patch a Linux Kernel.
>>
>>    Regards
>>    Simon
>>
>>
>>    On 09/26/2011 02:30 PM, Dat Tran wrote:
>>
>>        What does SPL stand for again? It looks really interesting.
>>
>>        Thanks.
>>
>>        On Mon, Sep 26, 2011 at 3:56 AM, Simon Schwarz
>>        <simonschwarzcor at googlemail.__**com
>>        <mailto:simonschwarzcor@**googlemail.com<simonschwarzcor at googlemail.com>
>> >
>>        <mailto:simonschwarzcor at __goog**lemail.com <http://googlemail.com>
>>
>>        <mailto:simonschwarzcor@**googlemail.com<simonschwarzcor at googlemail.com>
>> >>>
>>
>>        wrote:
>>
>>            On 09/25/2011 10:03 PM, dtran11 wrote:
>>
>>
>>                I am trying to make uboot boot as fast as possible for
>>        my omap3
>>                Overo board.
>>                I add the below to my config header file. Does anyone see
>>                anything I can add
>>                to it to make the build smaller and faster?  Thank you.
>>
>>
>>            [SNIP]
>>
>>            This may be of interest to you:
>>        http://article.gmane.org/____**gmane.comp.boot-loaders.u-____**
>> boot/108814<http://article.gmane.org/____gmane.comp.boot-loaders.u-____boot/108814>
>>        <http://article.gmane.org/__**gmane.comp.boot-loaders.u-__**
>> boot/108814<http://article.gmane.org/__gmane.comp.boot-loaders.u-__boot/108814>
>> >
>>        <http://article.gmane.org/__**gmane.comp.boot-loaders.u-__**
>> boot/108814<http://article.gmane.org/__gmane.comp.boot-loaders.u-__boot/108814>
>>        <http://article.gmane.org/**gmane.comp.boot-loaders.u-**
>> boot/108814<http://article.gmane.org/gmane.comp.boot-loaders.u-boot/108814>
>> >>
>>
>>            But will take some hacking to adapt.
>>
>>            Regards
>>            Simon
>>
>>
>>
>>
>>
>